crypt.c revision 83551 
1/*
2 * Copyright (c) 1999
3 *      Mark Murray.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY MARK MURRAY AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL MARK MURRAY OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/lib/libcrypt/crypt.c 83551 2001-09-16 21:35:07Z dillon $");
29
30#include <sys/types.h>
31#include <string.h>
32#include <libutil.h>
33#include "crypt.h"
34
35static const struct {
36	const char *const name;
37	char *(*const func)(const char *, const char *);
38	const char *const magic;
39} crypt_types[] = {
40#ifdef HAS_DES
41	{
42		"des",
43		crypt_des,
44		NULL
45	},
46#endif
47	{
48		"md5",
49		crypt_md5,
50		"$1$"
51	},
52#ifdef HAS_BLOWFISH
53	{
54		"blf",
55		crypt_blowfish,
56		"$2"
57	},
58#endif
59	{
60		NULL,
61		NULL
62	}
63};
64
65static int crypt_type = -1;
66
67static void
68crypt_setdefault(void)
69{
70	char *def;
71	int i;
72
73	if (crypt_type != -1)
74		return;
75	def = auth_getval("crypt_default");
76	if (def == NULL) {
77		crypt_type = 0;
78		return;
79	}
80	for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
81		if (strcmp(def, crypt_types[i].name) == 0) {
82			crypt_type = i;
83			return;
84		}
85	}
86	crypt_type = 0;
87}
88
89const char *
90crypt_get_format(void)
91{
92
93	crypt_setdefault();
94	return (crypt_types[crypt_type].name);
95}
96
97int
98crypt_set_format(char *type)
99{
100	int i;
101
102	crypt_setdefault();
103	for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
104		if (strcmp(type, crypt_types[i].name) == 0) {
105			crypt_type = i;
106			return (1);
107		}
108	}
109	return (0);
110}
111
112char *
113crypt(char *passwd, char *salt)
114{
115	int i;
116
117	crypt_setdefault();
118	for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
119		if (crypt_types[i].magic != NULL && strncmp(salt,
120		    crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0)
121			return (crypt_types[i].func(passwd, salt));
122	}
123	return (crypt_types[crypt_type].func(passwd, salt));
124}
125